Improvement in fly-fans



'UNTTEEV STATES PATENT OEETCE; l

HENRY B. BAKER, OF NELSONVILLE, OHIO.

IMPROVEMENT IN FLY-FANS.

Specification forming part of Letters Patent No. 186,292, dated January16, 1877 application filed December 2, 1876.

To all whom it may concern:

`Be it known that I, HENRY B. BAKER, of

Nelsonville, in the county of Athens and State of Ohio, have invented anew and valuable Improvement in Fly-Fans; and I do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the` same, reference being had to theannexed drawings, making a part of this specification, and to theletters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a plan view of myimproved fan; and Fig.

` 2-is a side view thereof, partly in section.

My invention relates to improvements in fly-raus which are operated byclockwork, and designed to drive dies "away from food, to prevent theapproach of mosquitos to a sleeper, and for other analogous purposes.

l produced bythe fan may be increased, diminished, oraltogetherdiscontinued without ar l resting the fan or impairing its eiiicacy as afly-scarer, all as hereinafter shown and described.

In the annexed drawings, the letters a a designate two spaced(preferably circular) plates, connectedby pillars b, and affordingbearings for the shafts of a suitable clock-work mechanism, which isactuated by a spring, and imparts rotation to a central shaft, B. Thisshaft extends up a certain distance through plate a, and the fan C willbe applied thereon above the said plate. The fan is composed of a hub,b, radial armsc, and a number of blades, d, of` any sufficiently lightand rigid material, as, for instance, wood veneer, tin, `or. pasteboard.The arms of the fan are of wire, and composed of two branches, c e',which diverge from the fan, andat their inner ends are a cer- `taindistance apart. r[he converging ends of these branches are pivoted to anangular metallic plate, f, between the armsig of which the blades arerigidly secured, and their diverging ends are inserted each in aperforation, i, formed in the periphery'of the hub. By this means theblades may be thrown out in line with the arms, raised up at rightangles thereto, or arranged in any intermediate position. By seizing theouter end `of the arms and giving a turn, the blades may be placed atany angle to the plane of rotation, and the current of air directedupward or downward, as may be required.

The speed of rotation of the fan is regulated as follows: Shaft B isprovided with a collar-disk, l,just below the upper plate a, upon whichthe free end of a brake-spring,j, will be caused to bear by setting up athumbscrew, m. This thumb-screw will pass through the upper plate a, andits lower end will bear upon the said spring at a point between its freeendl and the end se ured to the upper plate aforesaid. By setting up thespring hard, the fan will be arrestedv; but by a less marked applicationthereof the speed of rotation of the fan may be simply regulated.

The fan-blades may be of any shape, and ornamented or not, as I mayelect.

To prevent the accumulation of dust in the operative mechanism of myimproved ily-fan, I employ a hoop, E, of suiiicient depth to completelynclose the space between the upper surface of the upper plate a and thelower surg face of plate a'. This hoop may be of wood, metal, rubber, orany other suitable material, and may be ornamented upon its outer face.lt will also be removable, in order that the clock mechanism may bereadily got at in the event of any derangement.

I am aware that is not new to employ a spring actuated by a thumbscrew`to bear directly againstthe main shaft of a iiyfan mech-l anism andIserve as a brake. Hence ll make no broad claim to such devices.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In combination'with the main shaft of a rotary fan and a collar-disksecured thereon, a friction-spring, and a set-screw fordepresscollar-disk, substantially asl specified.

2. A iiy-fan consisting of a hub, b, having spaced perforations i, thedouble-branched arms c, and the blades d, pivoted to the end ofthe arms,and vibratingin their length edgewise, substantially as specified.

3. The combiuationywith the spaced plates a a and a clock mechanism of aily-fan, of the removable hoop, substantially as specified.

ing the freeend of the said spring upon `the f4. :Thefan-blades d,havinga universal-joint connection-with the arms of the'hnb,substantially as specified.

VvIn testimony that I claim the above .I have hereunto subscribed myname in the presence .of two witnesses.

HENRY B. BAKER. Witnesses: v

FRANK' GooLEY, W. C. HIGKMAN.

